ヨルシカ

Yorushika (ヨルシカ) is a Japanese rock duo founded in 2017. The group is composed of N-buna, a Vocaloid producer, and Suis, a female vocalist. They are known for their juxtaposition of "passionate" and "upbeat" production and instrumentation fused with heavier lyrical content, which often explores ideas such as love and human emotion and draws from works of literature including Masuji Ibuse and Jules Verne. The duo is extremely secretive, never publicly revealing their faces. N-buna stated that he does not want the creator to take precedence over the work.

Source: wikipedia